Physics, 28.01.2020 03:31 mary4228

The speedof a boat in still water is v. the boat is to make a round-trip ina river whose current travels at speed u. derive a formula for thetime needed to make a round trip of total distance d if the boatmakes the round trip by moving (a) upstream and back downstream,(b) directly across the river and back. we must assume u < v; why?

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